In case you have a reference string, JabRef offers the functionality to convert the text to BibTeX (or biblatex). For this, JabRef uses the technology offered by Grobid.
Example:
O. Kopp, A. Armbruster, und O. Zimmermann, "Markdown Architectural Decision Records: Format and Tool Support", in 10th ZEUS Workshop, 2018.
1.
Click Library and select "New entry from plain text..." Alternatively, you can press Ctrl+Shift+N.